Control of chlorates
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This post was last edited by sunjl1981 on 2013-1-6 20:00. Discuss how your company controls chlorates What adverse consequences can the formation of chlorates lead to? # hcbbs
Here, we control the chlorate content in the brine leaving the cell by adding acid to the electrolyzer; the adverse effects of chlorates are mainly corrosion of the gasket in the anode cell and an impact on the relative concentration of sodium chloride in the primary brine.
Salt cannot be removed, which causes some important instrument transmitters to give inaccurate readings; this is mainly due to salt accumulating on their surface areas. These devices need to be disassembled and cleaned regularly. Additionally, this issue affects the membrane tanks as well as the quality of the final alkaline product, resulting in it no longer being considered of high quality
The forced circulation tank uses acid added to the anode solution； The natural circulation tank uses a chlorate decomposition tank. The main impacts are: 1. Corrosion of the electrolyzer ； This leads to an increase in the alkali chlorate content in the finished product.
The lack of control over chlorate can lead to: damage to the secondary brine resin, corrosion of the electrolyzer, effects on the quality of the resulting alkali, changes in the concentration of the primary brine, and it also affects the SRS system, potentially destroying it
We add acid to the electrolyzer to control chlorates; using a chlorate decomposition tank consumes too much hydrochloric acid, and its effectiveness is also average. It also increases the amount of exhaust gas, which primarily affects the salt concentration; in the resin column, this leads to an increase in the free acid content (during acid regeneration), thereby damaging the resin. Chlorine is generated at the inlet of the electrolytic cell, resulting in unstable feed flow and counteracting the effects of adding acid. Chlorates in the alkali solution can cause corrosion of the evaporation equipment
Brother upstairs, the chlorine gas from the chlorate decomposition tank and the dechlorination tower can be combined into the main chlorine gas pipeline. This simply shows that your process department is competent – after all, the waste chlorine gas can be used to produce sodium hypochlorite, which is needed for primary brine
Brother upstairs, we integrated the chlorate decomposition tank into the main pipeline, and as a result the pressure in the main pipeline fluctuates. The brine from the chlorate decomposition tank was pumped through a U-turn into the discharge tank. It’s possible that the connection point where it’s integrated into the pipeline is incorrect. We generate waste chlorine gas to produce sodium hypochlorite, but too little brine is used. It’s a big problem for us that no one wants to buy them.
Our company uses both electrolytic cells with acid and chlorate decomposition cells to reduce the chlorate content.
Yes, we also add acid to the electrolytic cell, and control the chlorates through the chlorate decomposition cell